package com.example.nvzi;

import com.alibaba.fastjson.JSON;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.util.List;
import java.util.Map;

public class UtilHttpClient {
    /**
     * 向指定URL发送GET方法的请求
     *
     * @param url
     *            发送请求
     *
     *            的URL
     *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     * @return URL 所代表远程资源的响应结果
     */
    public static String sendGet(String url, Map<String,Object> objectMap){
        String result = "";
        BufferedReader in = null;
        try {
            String urlNameString = url + "?";


            int i=0;

            for(Map.Entry<String, Object> entry : objectMap.entrySet()){
                String mapKey = entry.getKey();
                Object mapValue = entry.getValue();
                System.out.println(mapKey+":"+mapValue);

                if (i==0){

                    urlNameString=urlNameString+mapKey+"="+mapValue;
                    i=1;

                }else {

                    urlNameString=urlNameString+"&"+mapKey+"="+mapValue;
                }



            }


            System.out.println("通过UtilHttpClient发送的请求为："+urlNameString);



            URL realUrl = new URL(urlNameString);
            // 打开和URL之间的连接
            URLConnection connection = realUrl.openConnection();
            // 设置通用的请求属性
            connection.setRequestProperty("accept", "*/*");
            connection.setRequestProperty("connection", "Keep-Alive");
            connection.setRequestProperty("user-agent",
                    "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            // 建立实际的连接
            connection.connect();

            connection.setConnectTimeout(5000);//5秒自动断开链接

            // 获取所有响应头字段
            Map<String, List<String>> map = connection.getHeaderFields();
            // 遍历所有的响应头字段
            for (String key : map.keySet()) {
                System.out.println(key + "--->" + map.get(key));
            }
            // 定义 BufferedReader输入流来读取URL的响应
            in = new BufferedReader(new InputStreamReader(
                    connection.getInputStream(),"UTF-8"));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
            System.out.println("发送GET请求出现异常！" + e);
            e.printStackTrace();
        }
        // 使用finally块来关闭输入流
        finally {
            try {
                if (in != null) {
                    in.close();
                }
            } catch (Exception e2) {
                e2.printStackTrace();
            }
        }
        return result;
    }
    /**
     * 向指定 URL 发送POST方法的请求
     *
     * @param url
     *            发送请求的 URL
     *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     * @return 所代表远程资源的响应结果
     */
    public static String sendPost(String url, String par,String token) {




        PrintWriter out = null;
        BufferedReader in = null;
        String result = "";
        try {
            URL realUrl = new URL(url);

            // 打开和URL之间的连接
            URLConnection conn = realUrl.openConnection();
            // 设置通用的请求属性
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent",
                    "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");

            conn.setRequestProperty("Authorization",token);


            conn.setConnectTimeout(5000);//5秒自动断开链接


            // 发送POST请求必须设置如下两行
            conn.setDoOutput(true);
            conn.setDoInput(true);
            // 获取URLConnection对象对应的输出流
            out = new PrintWriter(new OutputStreamWriter(conn.getOutputStream(), "utf-8"));
            out.append(par);
            out.flush();
            out.close();

            // flush输出流的缓冲
            out.flush();
            // 定义BufferedReader输入流来读取URL的响应
            in = new BufferedReader(
                    new InputStreamReader(conn.getInputStream(),"utf-8"));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
            System.out.println("发送 POST 请求出现异常！"+e);
            e.printStackTrace();
        }
        //使用finally块来关闭输出流、输入流
        finally{
            try{
                if(out!=null){
                    out.close();
                }
                if(in!=null){
                    in.close();
                }
            }
            catch(IOException ex){
                ex.printStackTrace();
            }
        }

        return result;
    }
    private static Log logger = LogFactory.getLog(UtilHttpClient.class);


    /**
     * 设置请求头和参数 post提交
     *
     * @param urlStr
     *            地址
     * @param headMap
     *            请求头
     * @param paramMap
     *            内容参数
     * @return
     */
    public static String connectPost(String urlStr, Map<String, String> headMap, Map<String, String> paramMap) {
        logger.info("========设置请求头和参数并以 post提交=======");
        URL url;
        String sCurrentLine = "";
        String sTotalString = "";

        DataOutputStream out = null;

        try {
            url = new URL(urlStr);
            logger.info("请求地址:" + urlStr);
            URLConnection URLconnection = url.openConnection();
            HttpURLConnection httpConnection = (HttpURLConnection) URLconnection;
            // httpConnection.setRequestProperty("Content-type", "application/json");
            httpConnection.setRequestProperty("Accept-Charset", "utf-8");
            httpConnection.setRequestProperty("contentType", "utf-8");

            if (headMap != null && !headMap.isEmpty()) {
                for (String key : headMap.keySet()) {
                    logger.info("头部信息key:" + key + "===值: " + headMap.get(key));
                    httpConnection.setRequestProperty(key, headMap.get(key));
                }
            }

            httpConnection.setRequestMethod("POST");


            httpConnection.setDoOutput(true);
            httpConnection.setDoInput(true);

            httpConnection.setConnectTimeout(5000);

            StringBuffer params = new StringBuffer();
            // 表单参数与get形式一样
            if (paramMap != null && !paramMap.isEmpty()) {
                params.append(JSON.toJSON(paramMap).toString());
                logger.info("请求参数: " + params.toString());
            }
            //System.out.println("params = " + params.toString());
            out = new DataOutputStream(httpConnection.getOutputStream());
            // 发送请求参数
            if (params!=null) {
                out.writeBytes(params.toString());
            }
            // flush输出流的缓冲
            out.flush();
            // int responseCode = httpConnection.getResponseCode();
            // if (responseCode == HttpURLConnection.HTTP_OK) {
            InputStream urlStream = httpConnection.getInputStream();
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(urlStream));

            while ((sCurrentLine = bufferedReader.readLine()) != null) {
                sTotalString += sCurrentLine;
            }
        } catch (Exception e) {
            logger.info("请求错误: " + e.getMessage());
            logger.error("系统错误:",e);
        } finally {

        }
        logger.info("响应信息: " + sTotalString);
        return sTotalString;
    }



}